Unlock harder levels by getting an average of 80% or higher.

Earn up to 5 stars for each level
The more questions you answer correctly, the more stars you'll unlock!

Each game has 10 questions.
Green box means correct.
Yellow box means incorrect.

Unlock harder levels by getting an average of 80% or higher.

Earn up to 5 stars for each level
The more questions you answer correctly, the more stars you'll unlock!

Each game has 10 questions.
Green box means correct.
Yellow box means incorrect.

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Math Games for Teachers

Grade 5 - Number

Standard 5.N.2 - Practice estimating addition equations by first rounding the numbers then adding them together.

Included Skills:

Use estimation strategies in problem-solving contexts.
Provide a context for when estimation is used to:
- make predictions.
- check the reasonableness of an answer.
- determine approximate answers.
Describe contexts in which overestimating is important.
Determine the approximate solution to a given problem not requiring an exact answer.
Estimate a sum or product, using compatible numbers.
Estimate the solution to a given problem, using compensation, and explain the reason for compensation.
Select and use an estimation strategy for a given problem.
Apply front-end rounding to estimate:
- sums; e.g., 253 + 615 is more than 200 + 600 = 800.
- differences; e.g., 974 – 250 is close to 900 – 200 = 700.
- products; e.g., the product of 23 × 24 is greater than 20 × 20 (400) and less than 25 × 25 (625).
- quotients; e.g., the quotient of 831 ÷ 4 is greater than 800 ÷ 4 (200).

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